168 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide
5 Common (*) Commands
*ESR (Standard Event Status Register)
(see page 1138)
Query Syntax
*ESR?
The *ESR? query returns the contents of the Standard Event Status
Register. When you read the Event Status Register, the value returned is
the total bit weights of all of the bits that are high at the time you read
the byte. Reading the register clears the Event Status Register.
The following table shows bit weight, name, and condition for each bit.
Return Format
<status><NL>
<status> ::= 0,..,255; an integer in NR1 format.
Table 66 Standard Event Status Register (ESR)
Bit Name Description When Set (1 = High = True), Indicates:
7 PON Power On An OFF to ON transition has occurred.
6 URQ User Request A front-panel key has been pressed.
5 CME Command Error A command error has been detected.
4 EXE Execution Error An execution error has been detected.
3 DDE Device Dependent Error A device-dependent error has been detected.
2 QYE Query Error A query error has been detected.
1 RQL Request Control The device is requesting control. (Not used.)
0 OPC Operation Complete Operation is complete.
To ESB bit in
Statu s Byte
Register
Standard Event
Status Enable
(Mask) Register
Standard Event
Status Register
*ESR?
*ESE
*ESE?
PON URQ EXE DDE QYE RQL OPCCM E

OR
10234567
128 64 16 8 4 2 132
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